Space-tech could make life easier for diabetics (Forwarded)

ESA News
http://www.esa.int

13 December 2007

Space-tech could make life easier for diabetics

German student Nicole Schmiedel has come up with a design for a
trendy-looking wris****ch that contains an innovative ultra-light insulin
pump to help people with type 1 diabetes. The watch produces its own
electricity thanks to the use of piezo-electric technology originally
developed for European satellites.

A prototype of the novel insulin pump wris****ch named COR won one of the
three Design and Technology Student Awards at this year's MATERIALICA trade
fair in Munich. It was presented for business professionals at this year's
European Space Technology Transfer Conference, an initiative of ESA's
Technology Transfer Programme Office.

Inside COR a piezo-electric transducer absorbs the energy of even the
slightest movement of the person who wears it and converts it into
electricity to drive the insulin pump.

The transducer is based on those developed for space programmes where they
are used in micro-positioning and vibration damping of optics embedded on
satellites, such as those incorporated in the MIDAS instrument onboard ESA's
Rosetta comet chaser.

"I got the idea for the insulin pump wris****ch when I watched a film of a
little 8-year old girl with diabetes using an insulin pump and saw what she
had to go through to get her daily doses of insulin," recalls Nicole
Schmiedel, an industrial design student at the Braunschweig University of
Arts in Germany.

Many diabetics who need multiple daily insulin injections to control their
blood sugar use cumbersome syringes or even bulkier equipment which limits
their mobility. Few use insulin pumps or other newer techniques. Schmiedel
wanted to design a system to improve the quality of life for diabetics and
allow them to lead as normal a life as possible.

Schmiedel's design looks like a modern wris****ch but contains a pump with
sufficient insulin for two to three weeks use by a type-1 diabetic. The pump
is attached to the user via a thin tube and a needle inserted under the skin
to allow the insulin to flow into the body continuously, substituting
conventional syringe injections.

"COR looks like a watch and not a medical device," she adds. "When the pump
is not in operation the menu switches to watch mode and displays the current
time and date. It also includes an alarm clock."

Piezo-electric transducer space technology -- squeezing electricity out of a
crystal

Piezo-electric transducer technology is based on a physical phenomenon that
has been known for a long time but was only researched and developed into a
handy technology for space programmes back in the 1990s. When a small
voltage is applied to a crystal such as quartz it causes it to change shape,
that is to expand or contract.

Onboard the Rosetta satellite this phenomenon is used in piezo-electric
transducers for micro-adjusting the positions of the MIDAS instrument as
well as for its vibration damping.

Conversely, pressure resulting in a deformation of the crystal shape
provokes a voltage that can be measured. Being proportional with the
deformation it can be used to measure the amount of pressure, or
deformation. In the same way the deformation of the piezo-electric
transducer from vibrations caused by any movement of COR generates a voltage
which can be used to drive the insulin pump.

Schmiedel has chosen the piezo-electric transducer "DuraAct" from the German
company INVENT to drive her insulin pump.

"We started research into this new area a while back and two years ago we
started the industrial production of our piezo-electric transducers named
DuraAct. It is used by different companies in different fields. For example
an automobile company uses our transducers in systems for noise damping of
cars," says Stefan Linke from INVENT GmbH.

"The insulin pump in the COR insulin wris****ch needs around 50-100
milliwatts, which could be provided with just one DuraAct transducer.
However, by using four to five transducers located around the wristband,
energy generation from movement in any direction is more efficient. It is
also safer as the insulin pump will continue to operate even if one
transducer fails."

The electricity is stored inside the wris****ch in accumulators ready for
use. This secures a stable electricity supply even through periods of
low-energy generation such as sleep.

"I was only able to design COR because the piezo-electric transducer
technology had already been developed for space programmes and was ready to
use," says Schmiedel. "The next step is to find a company to produce COR and
market it."

ESA's Technology Transfer Programme Office (TTPO)

The main mission of the ESA TTPO is to facilitate the use of space
technology and space systems for non-space applications and to further
demonstrate the benefit of the European space programme to European
citizens. The TTPO is responsible for defining the overall approach and
strategy for the transfer of space technologies including the incubation of
start up companies.

For more information, please contact:

Technology Transfer Programme
European Space Agency - ESTEC
Keplerlaan 1, P.O. BOX 299, 2200 AG, Noordwijk
The Netherlands
Office: +31 (0) 71 565 3910
Fax: +31 (0) 71 565 6635
Email: ttp @ esa.int

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